Although official figures for the 2026 IRMAA brackets have not been published, experts predict incremental changes due to inflation adjustments. Medicare Part B and Part D surcharges will be based on income from 2024 tax returns. If inflation remains steady, thresholds may increase slightly, reducing the number of beneficiaries subject to IRMAA surcharges. However, those earning near ... https://www.federalpensionadvisors.com/post/2025-irmaa-brackets